Need to sync Sharepoint folders for my Excel app's users

I have created an Excel-focused app with VBA, but I'd like to make it a user-friendly experience.  If it isn't too involved I'd like to automate the process of syncing SharePoint folders to make necessary files available to the users (coworkers at my organization):  sync SharePoint folders. 

I don't know what the best route is for starting on this, or where I can find documentation on the subject.  I am familiar with C# & Visual Studio to a degree, so hopefully they might be applied to this.

Thanks for any suggestions!